You are downloading the Simplify APPX file v18.104.22.168 for Windows Phone. Simplify is a free and useful Productivity app: With the tiles created by Simplify you can automate many steps (clicks) regarding your events, mails, calls and messages. For calendar ... You can now download the offline APPX file to install & try it.
Download Locations for Simplify 22.214.171.124 APPX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline APPX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Simplify APPX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.